Microsoft OLE DB Provider for ODBC Drivers error '80004005' Specified driver could not be loaded due to system error 5 (Oracle in OraHome92).

Solution Description
--------------------

Oracle 9.2 Client software requires that you give the Authenticated User
privilege to the Oracle Home by following these steps:

1.  Log on to Windows as a user with Administrator privileges.

2.  Launch Windows Explorer from the Start Menu and and navigate to the
    ORACLE_HOME folder.  This is typically the "Ora92" folder under the
    "Oracle" folder (i.e. D:\Oracle\Ora92).

3.  Right-click on the ORACLE_HOME folder and choose the "Properties" option
    from the drop down list.  A "Properties" window should appear.

4.  Click on the "Security" tab of the "Properties" window.

5.  Click on "Authenticated Users" item in the "Name" list (on Windows XP
    the "Name" list is called "Group or user names").

6.  Uncheck the "Read and Execute" box in the "Permissions" list under the
    "Allow" column (on Windows XP the "Permissions" list is called
    "Permissions for Authenticated Users").

7.  Re-check the "Read and Execute" box under the "Allow" column (this is
    the box you just unchecked).

8.  Click the "Advanced" button and in the "Permission Entries" list make
    sure you see the "Authenticated Users" listed there with:

        Permission = Read & Execute
          Apply To = This folder, subfolders and files

    If this is NOT the case, edit that line and make sure the "Apply onto"
    drop-down box is set to "This folder, subfolders and files".  This
    should already be set properly but it is important that you verify this.

9.  Click the "Ok" button until you close out all of the security properties
    windows.  The cursor may present the hour glass for a few seconds as it
    applies the permissions you just changed to all subfolders and files.

10.  Reboot your computer to assure that these changes have taken effect.


Re-execute the application and it should now work.

ref: http://www.ureader.com/message/451160.aspx

Error: 'ORA-28547: connection to server failed, probable Net8 admin error'

Error: 'ORA-28547: connection to server failed, probable Net8 admin error'
Any other error indicates that the tnsnames.ora, listener.ora, or both are not correct.

Cause: A failure occurred during initialization of a network connection from a client process to the Oracle server:
The connection was completed but a disconnect occurred while trying to perform protocol-specific initialization, usually due to use of different network protocols by opposite sides of the connection.
This usually is caused by incorrect Oracle Net administrative setup for database links or external procedure calls.
The most frequent specific causes are:

* The connection uses a connect string which refers to a Heterogeneous Services agent instead of an Oracle server.
* The connection uses a connect string which includes an (HS=) specification.


Check Oracle Net administration in the following ways:

* When using TNSNAMES.ORA or an Oracle Names server, make sure that the client connection to the ORACLE server uses the correct service name or SID.
* Check LISTENER.ORA on the connection end point's host machine to assure that this service name or SID refers to the correct server.
* Confirm in TNSNAMES.ORA or the equivalent service definition that the connect string does NOT contain (HS=).

Ref: http://www.dbmotive.com/